Human are called heterotrophs because they can not prepare their own food from simple carbons sources but obtain ready made food from other organisms like plants etc.
Answer:B
Expiation: Mediterranean (mild) means hot summers, cool winters;dry summers,wet winters
The correct answer is option B, that is, diminished food supply.
Some of the animals move to comparatively short distances in search of food or more favorable breeding or living conditions. However, the majority of animals, which migrate do so in order to find more habitable conditions and food. The phenomenon can be witnessed in almost all the prime animal groups like mammals, birds, amphibians, fish, reptiles, crustaceans, and insects.
D. water its 100% right trust me I just checked it and it was right.